Translational Readthrough Occasionally Occurs in the Coat Protein Gene of the SsRNA

Translational readthrough occasionally occurs in the coat protein gene of the ssRNA phage Qb.Which of the following describes this process?

A) The stop codon (UGA) is read as a tryptophan codon (UGG) .
B) The RNA-dependent RNA polymerase reads into the next gene.
C) The RNA-dependent RNA polymerase inserts an extra base in this gene.
D) The ribosome shifts back one base and reads a different reading frame.
E) The ribosome shifts forward one base and reads a different reading frame.